For most of the users currently online it’s extremely difficult to understand the concept of federation and how everything works, so I doubt it’ll ever be as prevalent as “the big social media platforms”, but for technically-inclined users, it’ll definitely have at least moderate success.
Gnome Terminal when I’m in GNOME, Konsole when I’m in KDE, and plain old xterm for i3 and any other WM. These just feel like they fit just right into their respective DE/WM.